Obscure geography trivia time: where would you find the steepest street in the world? You might guess San Francisco. If you’re a Guinness Book of Records-reading smart alec, you might say New Zealand. As it turns out, you’d be wrong – probably. In fact, nobody seems quite sure which is the world’s steepest, and then there’s the problem of what exactly counts as a street anyway. But we’ve looked into it, got out protractors out, and can now reveal the not-quite-scientifically-verified Google Sightseeing Top Six World’s Steepest Streets! And happily, the intrepid Street View car has struggled its…